1537078d8f
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
572 lines
13 KiB
C
572 lines
13 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010-2016 Solarflare Communications Inc.
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* All rights reserved.
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*
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* This software was developed in part by Philip Paeps under contract for
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* Solarflare Communications, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are
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* those of the authors and should not be interpreted as representing official
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* policies, either expressed or implied, of the FreeBSD Project.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_rss.h"
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/rman.h>
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#include <sys/syslog.h>
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#include <sys/taskqueue.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#ifdef RSS
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#include <net/rss_config.h>
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#endif
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#include "common/efx.h"
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#include "sfxge.h"
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static int
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sfxge_intr_line_filter(void *arg)
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{
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struct sfxge_evq *evq;
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struct sfxge_softc *sc;
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efx_nic_t *enp;
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struct sfxge_intr *intr;
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boolean_t fatal;
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uint32_t qmask;
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evq = (struct sfxge_evq *)arg;
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sc = evq->sc;
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enp = sc->enp;
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intr = &sc->intr;
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KASSERT(intr != NULL, ("intr == NULL"));
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KASSERT(intr->type == EFX_INTR_LINE,
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("intr->type != EFX_INTR_LINE"));
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if (intr->state != SFXGE_INTR_STARTED)
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return (FILTER_STRAY);
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(void)efx_intr_status_line(enp, &fatal, &qmask);
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if (fatal) {
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(void) efx_intr_disable(enp);
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(void) efx_intr_fatal(enp);
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return (FILTER_HANDLED);
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}
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if (qmask != 0) {
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intr->zero_count = 0;
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return (FILTER_SCHEDULE_THREAD);
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}
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/* SF bug 15783: If the function is not asserting its IRQ and
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* we read the queue mask on the cycle before a flag is added
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* to the mask, this inhibits the function from asserting the
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* IRQ even though we don't see the flag set. To work around
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* this, we must re-prime all event queues and report the IRQ
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* as handled when we see a mask of zero. To allow for shared
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* IRQs, we don't repeat this if we see a mask of zero twice
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* or more in a row.
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*/
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if (intr->zero_count++ == 0) {
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if (evq->init_state == SFXGE_EVQ_STARTED) {
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if (efx_ev_qpending(evq->common, evq->read_ptr))
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return (FILTER_SCHEDULE_THREAD);
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efx_ev_qprime(evq->common, evq->read_ptr);
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return (FILTER_HANDLED);
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}
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}
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return (FILTER_STRAY);
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}
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static void
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sfxge_intr_line(void *arg)
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{
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struct sfxge_evq *evq = arg;
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(void)sfxge_ev_qpoll(evq);
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}
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static void
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sfxge_intr_message(void *arg)
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{
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struct sfxge_evq *evq;
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struct sfxge_softc *sc;
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efx_nic_t *enp;
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struct sfxge_intr *intr;
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unsigned int index;
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boolean_t fatal;
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evq = (struct sfxge_evq *)arg;
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sc = evq->sc;
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enp = sc->enp;
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intr = &sc->intr;
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index = evq->index;
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KASSERT(intr != NULL, ("intr == NULL"));
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KASSERT(intr->type == EFX_INTR_MESSAGE,
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("intr->type != EFX_INTR_MESSAGE"));
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if (__predict_false(intr->state != SFXGE_INTR_STARTED))
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return;
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(void)efx_intr_status_message(enp, index, &fatal);
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if (fatal) {
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(void)efx_intr_disable(enp);
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(void)efx_intr_fatal(enp);
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return;
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}
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(void)sfxge_ev_qpoll(evq);
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}
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static int
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sfxge_intr_bus_enable(struct sfxge_softc *sc)
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{
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struct sfxge_intr *intr;
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struct sfxge_intr_hdl *table;
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driver_filter_t *filter;
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driver_intr_t *handler;
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int index;
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int err;
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intr = &sc->intr;
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table = intr->table;
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switch (intr->type) {
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case EFX_INTR_MESSAGE:
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filter = NULL; /* not shared */
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handler = sfxge_intr_message;
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break;
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case EFX_INTR_LINE:
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filter = sfxge_intr_line_filter;
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handler = sfxge_intr_line;
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break;
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default:
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KASSERT(0, ("Invalid interrupt type"));
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return (EINVAL);
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}
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/* Try to add the handlers */
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for (index = 0; index < intr->n_alloc; index++) {
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if ((err = bus_setup_intr(sc->dev, table[index].eih_res,
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INTR_MPSAFE|INTR_TYPE_NET, filter, handler,
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sc->evq[index], &table[index].eih_tag)) != 0) {
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goto fail;
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}
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#ifdef SFXGE_HAVE_DESCRIBE_INTR
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if (intr->n_alloc > 1)
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bus_describe_intr(sc->dev, table[index].eih_res,
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table[index].eih_tag, "%d", index);
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#endif
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#ifdef RSS
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bus_bind_intr(sc->dev, table[index].eih_res,
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rss_getcpu(index));
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#else
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bus_bind_intr(sc->dev, table[index].eih_res, index);
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#endif
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}
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return (0);
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fail:
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/* Remove remaining handlers */
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while (--index >= 0)
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bus_teardown_intr(sc->dev, table[index].eih_res,
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table[index].eih_tag);
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return (err);
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}
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static void
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sfxge_intr_bus_disable(struct sfxge_softc *sc)
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{
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struct sfxge_intr *intr;
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struct sfxge_intr_hdl *table;
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int i;
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intr = &sc->intr;
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table = intr->table;
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/* Remove all handlers */
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for (i = 0; i < intr->n_alloc; i++)
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bus_teardown_intr(sc->dev, table[i].eih_res,
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table[i].eih_tag);
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}
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static int
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sfxge_intr_alloc(struct sfxge_softc *sc, int count)
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{
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device_t dev;
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struct sfxge_intr_hdl *table;
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struct sfxge_intr *intr;
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struct resource *res;
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int rid;
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int error;
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int i;
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dev = sc->dev;
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intr = &sc->intr;
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error = 0;
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table = malloc(count * sizeof(struct sfxge_intr_hdl),
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M_SFXGE, M_WAITOK);
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intr->table = table;
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for (i = 0; i < count; i++) {
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rid = i + 1;
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res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (res == NULL) {
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device_printf(dev, "Couldn't allocate interrupts for "
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"message %d\n", rid);
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error = ENOMEM;
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break;
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}
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table[i].eih_rid = rid;
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table[i].eih_res = res;
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}
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if (error != 0) {
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count = i - 1;
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for (i = 0; i < count; i++)
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bus_release_resource(dev, SYS_RES_IRQ,
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table[i].eih_rid, table[i].eih_res);
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}
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return (error);
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}
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static void
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sfxge_intr_teardown_msix(struct sfxge_softc *sc)
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{
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device_t dev;
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struct resource *resp;
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int rid;
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dev = sc->dev;
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resp = sc->intr.msix_res;
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rid = rman_get_rid(resp);
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bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
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}
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static int
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sfxge_intr_setup_msix(struct sfxge_softc *sc)
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{
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struct sfxge_intr *intr;
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struct resource *resp;
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device_t dev;
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int count;
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int rid;
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dev = sc->dev;
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intr = &sc->intr;
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/* Check if MSI-X is available. */
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count = pci_msix_count(dev);
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if (count == 0)
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return (EINVAL);
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/* Do not try to allocate more than already estimated EVQ maximum */
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KASSERT(sc->evq_max > 0, ("evq_max is zero"));
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count = MIN(count, sc->evq_max);
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rid = PCIR_BAR(4);
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resp = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (resp == NULL)
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return (ENOMEM);
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if (pci_alloc_msix(dev, &count) != 0) {
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bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
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return (ENOMEM);
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}
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/* Allocate interrupt handlers. */
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if (sfxge_intr_alloc(sc, count) != 0) {
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bus_release_resource(dev, SYS_RES_MEMORY, rid, resp);
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pci_release_msi(dev);
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return (ENOMEM);
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}
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intr->type = EFX_INTR_MESSAGE;
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intr->n_alloc = count;
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intr->msix_res = resp;
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return (0);
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}
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static int
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sfxge_intr_setup_msi(struct sfxge_softc *sc)
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{
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struct sfxge_intr_hdl *table;
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struct sfxge_intr *intr;
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device_t dev;
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int count;
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int error;
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dev = sc->dev;
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intr = &sc->intr;
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table = intr->table;
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/*
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* Check if MSI is available. All messages must be written to
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* the same address and on x86 this means the IRQs have the
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* same CPU affinity. So we only ever allocate 1.
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*/
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count = pci_msi_count(dev) ? 1 : 0;
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if (count == 0)
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return (EINVAL);
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if ((error = pci_alloc_msi(dev, &count)) != 0)
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return (ENOMEM);
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/* Allocate interrupt handler. */
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if (sfxge_intr_alloc(sc, count) != 0) {
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pci_release_msi(dev);
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return (ENOMEM);
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}
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intr->type = EFX_INTR_MESSAGE;
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intr->n_alloc = count;
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return (0);
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}
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static int
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sfxge_intr_setup_fixed(struct sfxge_softc *sc)
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{
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struct sfxge_intr_hdl *table;
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struct sfxge_intr *intr;
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struct resource *res;
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device_t dev;
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int rid;
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dev = sc->dev;
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intr = &sc->intr;
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rid = 0;
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res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
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RF_SHAREABLE | RF_ACTIVE);
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if (res == NULL)
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return (ENOMEM);
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table = malloc(sizeof(struct sfxge_intr_hdl), M_SFXGE, M_WAITOK);
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table[0].eih_rid = rid;
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table[0].eih_res = res;
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intr->type = EFX_INTR_LINE;
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intr->n_alloc = 1;
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intr->table = table;
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return (0);
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}
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static const char *const __sfxge_err[] = {
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"",
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"SRAM out-of-bounds",
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"Buffer ID out-of-bounds",
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"Internal memory parity",
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"Receive buffer ownership",
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"Transmit buffer ownership",
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"Receive descriptor ownership",
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"Transmit descriptor ownership",
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"Event queue ownership",
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"Event queue FIFO overflow",
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"Illegal address",
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"SRAM parity"
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};
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void
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sfxge_err(efsys_identifier_t *arg, unsigned int code, uint32_t dword0,
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uint32_t dword1)
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{
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struct sfxge_softc *sc = (struct sfxge_softc *)arg;
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device_t dev = sc->dev;
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log(LOG_WARNING, "[%s%d] FATAL ERROR: %s (0x%08x%08x)",
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device_get_name(dev), device_get_unit(dev),
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__sfxge_err[code], dword1, dword0);
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}
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void
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sfxge_intr_stop(struct sfxge_softc *sc)
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{
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struct sfxge_intr *intr;
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intr = &sc->intr;
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KASSERT(intr->state == SFXGE_INTR_STARTED,
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("Interrupts not started"));
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intr->state = SFXGE_INTR_INITIALIZED;
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/* Disable interrupts at the NIC */
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efx_intr_disable(sc->enp);
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/* Disable interrupts at the bus */
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sfxge_intr_bus_disable(sc);
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/* Tear down common code interrupt bits. */
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efx_intr_fini(sc->enp);
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}
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int
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sfxge_intr_start(struct sfxge_softc *sc)
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{
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struct sfxge_intr *intr;
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efsys_mem_t *esmp;
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int rc;
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intr = &sc->intr;
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esmp = &intr->status;
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KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
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("Interrupts not initialized"));
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/* Zero the memory. */
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(void)memset(esmp->esm_base, 0, EFX_INTR_SIZE);
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/* Initialize common code interrupt bits. */
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(void)efx_intr_init(sc->enp, intr->type, esmp);
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/* Enable interrupts at the bus */
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if ((rc = sfxge_intr_bus_enable(sc)) != 0)
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goto fail;
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intr->state = SFXGE_INTR_STARTED;
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/* Enable interrupts at the NIC */
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efx_intr_enable(sc->enp);
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return (0);
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fail:
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/* Tear down common code interrupt bits. */
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efx_intr_fini(sc->enp);
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intr->state = SFXGE_INTR_INITIALIZED;
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return (rc);
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}
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void
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sfxge_intr_fini(struct sfxge_softc *sc)
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{
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struct sfxge_intr_hdl *table;
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struct sfxge_intr *intr;
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efsys_mem_t *esmp;
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device_t dev;
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int i;
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dev = sc->dev;
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intr = &sc->intr;
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esmp = &intr->status;
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table = intr->table;
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KASSERT(intr->state == SFXGE_INTR_INITIALIZED,
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("intr->state != SFXGE_INTR_INITIALIZED"));
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/* Free DMA memory. */
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sfxge_dma_free(esmp);
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/* Free interrupt handles. */
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for (i = 0; i < intr->n_alloc; i++)
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bus_release_resource(dev, SYS_RES_IRQ,
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table[i].eih_rid, table[i].eih_res);
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if (table[0].eih_rid != 0)
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pci_release_msi(dev);
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if (intr->msix_res != NULL)
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sfxge_intr_teardown_msix(sc);
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/* Free the handle table */
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free(table, M_SFXGE);
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intr->table = NULL;
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intr->n_alloc = 0;
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/* Clear the interrupt type */
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intr->type = EFX_INTR_INVALID;
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intr->state = SFXGE_INTR_UNINITIALIZED;
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}
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int
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sfxge_intr_init(struct sfxge_softc *sc)
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{
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device_t dev;
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struct sfxge_intr *intr;
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efsys_mem_t *esmp;
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int rc;
|
|
|
|
dev = sc->dev;
|
|
intr = &sc->intr;
|
|
esmp = &intr->status;
|
|
|
|
KASSERT(intr->state == SFXGE_INTR_UNINITIALIZED,
|
|
("Interrupts already initialized"));
|
|
|
|
/* Try to setup MSI-X or MSI interrupts if available. */
|
|
if ((rc = sfxge_intr_setup_msix(sc)) == 0)
|
|
device_printf(dev, "Using MSI-X interrupts\n");
|
|
else if ((rc = sfxge_intr_setup_msi(sc)) == 0)
|
|
device_printf(dev, "Using MSI interrupts\n");
|
|
else if ((rc = sfxge_intr_setup_fixed(sc)) == 0) {
|
|
device_printf(dev, "Using fixed interrupts\n");
|
|
} else {
|
|
device_printf(dev, "Couldn't setup interrupts\n");
|
|
return (ENOMEM);
|
|
}
|
|
|
|
/* Set up DMA for interrupts. */
|
|
if ((rc = sfxge_dma_alloc(sc, EFX_INTR_SIZE, esmp)) != 0)
|
|
return (ENOMEM);
|
|
|
|
intr->state = SFXGE_INTR_INITIALIZED;
|
|
|
|
return (0);
|
|
}
|